by Ann Oldenburg, USA TODAY

by Ann Oldenburg, USA TODAY

Cory Monteith, 30, checked into rehab when he was 19, and now he has checked into rehab again.

The actor who plays Finn on the Fox series Glee has "voluntarily admitted himself to a treatment facility for substance addiction," his rep tells USA TODAY. "He graciously asks for your respect and privacy as he takes the necessary steps towards recovery."

Monteith told Parademagazine in 2011 he was "out of control" as a teen. He talked about how at age 13, he was getting drunk, smoking pot and skipping school in Victoria, British Columbia, after his parents divorced. By 16, he said, his drug use had escalated. He was "doing anything and everything, as much as possible." At 19, he went into rehab.

Monteith's Glee co-star and girlfriend, Lea Michele, issued a statement about the news, saying, "I love and support Cory and will stand by him through this. I am grateful and proud he made this decision."

Michele and Monteith have been dating for about a year.

Glee is shooting its fourth season now. Production on the remaining two episodes is expected to continue as scheduled, according to The Hollywood Reporter.

"Cory is a beloved member of the Glee family and we fully support his decision to seek treatment," 20th Century Fox TV, which produces the show, told THR in a statement. "Everyone at the show wishes him well and looks forward to his return."